Methanol, Ethanol, and Isopropyl, which doesn't hurt aluminum?

Messages
1,856
Location
PA
Alcohols shouldn't react with aluminum, or aluminum alloys. They do however tend to react with hydrocarbons and some petroleum based rubbers.
 
Messages
180
Location
Harrisonburg VA
Believe there is some evidence reported in the literature that methanol does indeed react with Aluminum. That does not occur with either ethanol or isopropanol.
 
Messages
39,805
Location
Pottstown, PA
My understanding was that both Ethanol and Methanol are harmful to your engine. I was under the impression, after reading my owners manual, that Ethanol is limited to 10-15% and that this is with the use of "co-solvents" that inhibit the harmful effects. Just put "ethanol (or methanol)fuel aluminum " into google. Plenty of hits. One site, selling racing carbs for garden tractors, just said that methanol will corrode aluminum if it couldn't evaporate. In your situation ..it should evaporate. [I dont know]
 
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